CN101404189A - A kind of rapid ceramization refractory cable material and preparation method thereof - Google Patents

Abstract

The invention discloses a rapid ceramic fire-resistant cable material and a preparation method thereof, wherein the ceramic fire-resistant cable material comprises the following raw materials in parts by weight: 60-70 parts of ethylene-vinyl acetate copolymer, 30-40 parts of polyethylene, 50-100 parts of porcelain forming filler, 0.5-2.5 parts of coupling agent, 80-100 parts of flame retardant A, 10-20 parts of flame retardant B, 1-2 parts of lubricant and 1-3 parts of antioxidant. The preparation process of the cable material comprises the following steps: surface treatment of the ceramic filler, proportioning, mixing, granulation, drying and the like. The fire-resistant cable material is a polymer-based composite material, has the same behavior as a common extruded cable insulating material in a common environment, namely has good processability and is convenient to construct, and can be vitrified within 10 minutes at the temperature of 750 ℃ and higher, and the vitrified material can ensure that a line normally runs for more than 90 minutes at the temperature of 750-950 ℃.

Description

A kind of rapid ceramization refractory cable material and preparation method thereof

technical field

The invention relates to a cable material, more specifically to a rapid ceramicization refractory cable material.

Background technique

With the development of society, economy and science and technology, wires and cables are used more and more in people's daily life and in high-tech fields such as aerospace and military. Modern buildings use more and more combustibles, especially in crowded places such as large luxury entertainment venues and stations. If the circuit system fails at the same time when a fire breaks out in these places, the personal and property safety of all personnel on site will face greater threats. If combustibles emit a lot of smoke, especially toxic gases, it will also cause secondary the occurrence of disasters.

When a fire breaks out in some large, high-rise buildings or places, the fire causes a circuit failure, which makes the alarm, automatic door, elevator, sprinkler system, various signal transmission systems and other emergency rescue equipment stop working, making it difficult for on-site personnel to escape. Not only that, electrical faults can also hinder the work of firefighting and lifesaving personnel. And if the power system and signal system can normally transmit power, transmit various control and alarm signals, it will provide valuable time for people's escape, automatic alarm, fire-fighting facilities activation, rescue and use of emergency equipment, so that disaster relief and rescue work can go smoothly. to minimize the damage caused by the fire. Therefore, people pay more and more attention to ensuring the normal operation of the circuit system when a fire occurs.

Chinese patent CN1095181 uses mica tape and non-combustible silicon coating to make a high fire-resistant cable with high fire resistance, high temperature resistance, low smoke and no halogen when burning. Chinese patent CN101169993 adopts fire-resistant inorganic fiber heat insulation material and silicon-based elastomer composite material to make heat-insulated fire-resistant cables. Chinese patent CN1625786 adopts ethylene-vinyl acetate copolymer, glass material and inert compound to make high-temperature carbon-forming fire-resistant cables. Chinese patent CN1480958 uses mineral expansion material to make heat-insulating and fire-resistant cables. Chinese patent CN1710670 adopts mica tape, metal sheath and inorganic refractory expansion material to make a refractory cable that can operate for a long time in a temperature environment below 800°C.

Although the above-mentioned fire-resistant cable can ensure the normal operation of the circuit system when a fire occurs, its production process is complicated, the cost is high, the construction is difficult and it is easily damaged.

Contents of the invention

The object of the present invention is to provide a fast ceramic refractory cable material in order to solve the problems of the prior art such as complex production process, high cost, difficult construction and easy damage.

The present invention is achieved through the following technical solutions:

A rapid ceramization refractory cable material is characterized in that the raw material components of the rapid ceramization refractory cable material and the weight parts of each component are respectively:

Ethylene-vinyl acetate copolymer 60～70

Polyethylene 30～40

Porcelain filling 50～100

Coupling agent 0.5～2.5

Flame retardant A 80～100

Flame retardant B 10～20

Lubricant 1～2

Antioxidant 1～3

The porcelain-forming filler is one or any mixture of glass powder, ceramic powder, glass fiber, talcum powder, mica powder or clay.

The above-mentioned porcelain filler is preferably composed of high softening point component porcelain filler and low softening point component porcelain filler. The temperature is between 300 and 500°C; among them, a porcelain filler composed of a low softening point component can be used in conjunction with the same type or a different type of high softening point porcelain filler, and a high softening point component porcelain filler can also be used with the same type or a different type of porcelain filler. Low softening point components are used together with porcelain fillers, the amount of high softening point components is 40% to 70% of the total weight of porcelain fillers, and the amount of low softening point components is 30% to 60% of the total weight of porcelain fillers. %.

The coupling agent is a silane coupling agent or a titanate coupling agent. Preferred silane coupling agents are 3-methacryloxypropyltrimethoxysilane, γ-aminopropyltriethoxysilane, ethyl orthosilicate, trimethoxysilane, anilinomethyltrimethoxy Silane, methyl orthosilicate, γ-aminopropylmethyldimethoxysilane or γ-methacryloxypropyltrimethoxysilane; the titanate coupling agent is tetrabutyl orthotitanate ester, isopropyl dioleoyloxy(dioctyl phosphate acyloxy) titanate, isopropoxy tris(dioctyl phosphate) titanate or oxyacetate bis(dioctyl phosphate) ) titanate.

Wherein said polyethylene is linear low-density polyethylene with a melt flow rate of 1.0-4.0g/10min; said flame retardant A is at least one of magnesium hydroxide or aluminum hydroxide. The flame retardant B is at least one of melamine or zinc borate. Described lubricant is a kind of in stearic acid, zinc stearate or calcium stearate. The antioxidant is one of the antioxidant 1010 or the antioxidant 300.

The present invention also provides the preparation method of the above-mentioned rapid ceramic refractory cable material, the specific steps are: firstly add 50-100 parts by weight of porcelain filler and 0.5-2.5 parts by weight of coupling agent into the high-speed mixer, heat the mixture at 60-70 °C , after mixing at high speed for 10-15 minutes, the surface-modified porcelain filler is obtained, and the material is discharged for later use; then 60-70 parts by weight of ethylene-vinyl acetate copolymer, 30-40 parts by weight of polyethylene, 1-3 parts by weight of Antioxidant, 80-100 parts by weight of flame retardant A, 10-20 parts by weight of flame retardant B, the surface-modified ceramic filler prepared in the above steps, and 1-2 parts by weight of lubricant are added to the high-speed mixer, Mix at room temperature for 2-3 minutes, twin-screw granulation, cold cut, and then dry at 70-80°C for 0.5-2 hours, then weigh and pack to obtain the product. Among them, it is preferable that the temperature of each section of the extruder is as follows: the first zone is 120-130°C, the second zone is 130-140°C, the third zone is 140-150°C, and the die temperature is 150-160°C.

Beneficial effect:

The rapid ceramization refractory cable material of the present invention has good processing performance under normal environment, has the characteristics of rapid ceramization under high temperature, and can ensure the normal operation of the line. The rapid ceramization refractory cable material of the present invention can be produced by using existing production equipment and production methods, and has the advantages of simple process, convenient construction, low cost, and no pollution.

The rapid ceramization refractory cable material of the present invention can quickly form dense ceramic products in the range of 750°C to 950°C, and the formed ceramic products have good thermal shock resistance, high temperature insulation, compactness, and certain high temperature The strength can ensure the normal operation of the circuit under high temperature.

In addition to being used as a ceramic refractory cable material, this composite material can also be used in various fields such as transportation industry (including land, sea, and air), construction industry, protection of flammable materials, and military applications. benefits and social benefits.

Detailed ways

The present invention is illustrated below through specific examples, but the present invention is not limited to these examples.

Used linear low density polyethylene (DJM1820) in the example, melt flow rate is 2.0g/10min, and linear low density polyethylene (183N), melt flow rate is 3.0g/10min; High softening point glass powder ( 840°C, GA) is commercially available milled E glass fiber; the glass fiber used (840°C, GB) is commercially available E glass fiber; low softening point glass powder (400°C, GC) is commercially available glass powder; Sales of cable-grade talcum powder (HS). Magnesium hydroxide (MH), aluminum hydroxide, melamine (MA), zinc borate (ZB) are all commercially available and surface treated.

Example 1

A rapid ceramization refractory cable material, its raw material ratio is as follows:

Ethylene-vinyl acetate copolymer 60 parts

Linear low density polyethylene (DJM1820) 40 parts

GA 26 copies

GC 39 copies

3-methacryloxypropyltrimethoxysilane 0.7 parts

Magnesium Hydroxide 80 parts

Melamine 20 parts

stearic acid 1 part

Antioxidant 1010 1 part

Add GA, GC and 3-methacryloxypropyltrimethoxysilane into a high-speed mixer at 60°C, mix for 10 minutes, and discharge for later use. Add ethylene-vinyl acetate copolymer, linear low-density polyethylene, antioxidant, flame retardant, ceramic filler, and lubricant into the high-speed mixer in sequence, mix at room temperature for 2 to 3 minutes, and then granulate with twin-screw, extrude The temperature of each section of the machine is as follows: the first zone is 125°C, the second zone is 135°C, the third zone is 145°C, the head temperature is 155°C. After granulation, cold cut, then dry at 70-80°C for 1 hour, then weigh and pack.

The performance test results are shown in Table 1.

Example 2

A rapid ceramization refractory cable material, its raw material ratio is as follows:

Ethylene-vinyl acetate copolymer 65 parts

Linear low density polyethylene (DJM1820) 35 parts

GA 40 copies

GC 40 copies

Isopropyl dioleate (dioctyl phosphate acyloxy) titanate 1.2 parts

Magnesium Hydroxide 90 parts

Melamine 15 servings

Stearic acid 1.5 parts

Antioxidant 300 1.5 parts

The preparation method of the above-mentioned cable material is the same as that of Example 1, and the performance test results are shown in Table 1.

Example 3

A rapid ceramization refractory cable material, its raw material ratio is as follows:

Ethylene-vinyl acetate copolymer 70 parts

Linear low density polyethylene (DJM1820) 30 parts

GA 54 copies

GC 36 copies

γ-Methacryloxypropyltrimethoxysilane 1.2 parts

Magnesium Hydroxide 95 parts

Melamine 10 servings

Zinc stearate 1.8 parts

Antioxidant 300 2 parts

The preparation method of the above-mentioned cable material is the same as that of Example 1, and the performance test results are shown in Table 1.

Example 4

A rapid ceramization refractory cable material, its raw material ratio is as follows:

Ethylene-vinyl acetate copolymer 60 parts

Linear low density polyethylene (DJM1820) 40 parts

GB 26 copies

GC 39 copies

γ-Methacryloxypropyltrimethoxysilane 0.7 parts

Aluminum hydroxide 80 parts

Zinc borate 20 parts

stearic acid 1 part

Antioxidant 1010 1 part

The preparation method of the above-mentioned cable material is the same as that of Example 1, and the performance test results are shown in Table 1.

Example 5

A rapid ceramization refractory cable material, its raw material ratio is as follows:

Ethylene-vinyl acetate copolymer 65 parts

Linear low density polyethylene (DJM1820) 35 parts

GA 40 copies

GC 40 copies

3-Methacryloxypropyltrimethoxysilane 1.2 parts

Aluminum hydroxide 90 parts

Zinc borate 15 parts

Calcium stearate 1.5 parts

Antioxidant 300 1.5 parts

The preparation method of the above-mentioned cable material is the same as that of Example 1, and the performance test results are shown in Table 1.

Example 6

A rapid ceramization refractory cable material, its raw material ratio is as follows:

Ethylene-vinyl acetate copolymer 70 parts

Linear low density polyethylene (DJM1820) 30 parts

GB 54 copies

GC 36 copies

Isopropoxy tri(dioctyl phosphate) titanate 1.2 parts

Aluminum hydroxide 95 parts

Zinc borate 10 parts

Stearic acid 1.8 parts

Antioxidant 1010 2 parts

The preparation method of the above-mentioned cable material is the same as that of Example 1, and the performance test results are shown in Table 1.

Example 7

A rapid ceramization refractory cable material, its raw material ratio is as follows:

Ethylene-vinyl acetate copolymer 70 parts

Linear low density polyethylene (183N) 30 parts

HS 54 copies

GC 36 copies

Isopropoxy tri(dioctyl phosphate) titanate 1.2 parts

Aluminum hydroxide 90 parts

Zinc borate 15 parts

Stearic acid 1.8 parts

Antioxidant 1010 1.5 parts

The preparation method of the above-mentioned cable material is the same as that of Example 1, and the performance test results are shown in Table 1.

Table 1

Using the extrusion method, a 0.7mm thick refractory insulation layer was extruded on the 1.5mm ² copper core, and the vertical combustion test was carried out on the cable according to the national standard GB/T 18380.2. The results are shown in Table 2. It can be seen that the refractory insulating layer forms a dense ceramic layer on the surface of the wire.

Table 2

sample 1 2 3 4 5 6 7 result dense layer dense layer dense layer dense layer dense layer dense layer dense layer .

Claims (8)

1, a kind of fast ceramic flame-resistant cable is characterized in that the weight portion of its raw material components and each component is respectively:

Ethylene-vinyl acetate copolymer 60～70

Polyethylene 30～40

Become porcelain filling 50～100

Coupling agent 0.5～2.5

Fire retardant A 80～100

Fire retardant B 10～20

Lubricant 1～2

Antioxidant 1～3.

2, fast ceramic flame-resistant cable according to claim 1 is characterized in that described one-tenth porcelain filling is a kind of or any several mixture in glass dust, ceramic powder, glass fibre, talcum powder, mica powder or the clay.

3, fast ceramic flame-resistant cable according to claim 2 is characterized in that described one-tenth porcelain filling becomes porcelain filling to become porcelain filling to form with the low softening point component by the high softening-point component; Wherein the high softening-point component become porcelain filling softening point at 800～1500 ℃, the low softening point component becomes the softening point of porcelain filling at 300～500 ℃; The high softening-point component becomes the porcelain filling consumption to be into 40%～70% of porcelain filling total weight, and the low softening point component becomes the porcelain filling consumption to be into 30%～60% of porcelain filling total weight.

4, fast ceramic flame-resistant cable according to claim 1 is characterized in that described coupling agent is silane coupler or titanate coupling agent.

5, fast ceramic flame-resistant cable according to claim 4 is characterized in that described silane coupler is 3-metering system acyloxy propyl trimethoxy silicane, gamma-aminopropyl-triethoxy-silane, tetraethoxysilane, trimethoxy silane, anilinomethyl trimethoxy silane, methyl silicate, γ-aminopropyl methyl dimethoxysilane or gamma-methyl allyl acyloxypropyl trimethoxysilane; Described titanate coupling agent is two (dioctyl phosphate) titanate esters of tetrabutyl titanate, isopropyl two oleic acid acyloxy (dioctyl phosphoric acid acyloxy) titanate esters, isopropoxy three (dioctylphosphoric acid ester) titanate esters or fluoroacetic acid ester.

6, fast ceramic flame-resistant cable according to claim 1 is characterized in that described polyethylene is a LLDPE, and melt flow rate (MFR) is 1.0～4.0g/10min; Described fire retardant A is at least a kind of in magnesium hydroxide, the aluminium hydroxide; Described fire retardant B is at least a kind of in melamine, the Firebrake ZB; Described lubricant is stearic acid, zinc stearate or calcium stearate; Described antioxidant is antioxidant 1010 or antioxidant 300.

7, a kind of preparation method of fast ceramic flame-resistant cable as claimed in claim 1, its concrete steps are: at first 50～100 weight portions are become porcelain filling and 0.5～2.5 weight portion coupling agent to add in the high-speed mixer, 60～70 ℃, behind high-speed mixing 10～15min, the one-tenth porcelain filling that gets surface modification is standby; Successively become porcelain filling, 1～2 weight portion lubricant of 60～70 parts by weight of ethylene-vinyl acetate co-polymer with 30～40 weight account polyethylenes, 1～3 weight portion antioxidant, 80～100 parts by weight of flame retardant A, 10～20 parts by weight of flame retardant B, surface modification added in the high-speed mixer again, mix 2～3min, the twin-screw granulation, cold cut, 70～80 ℃ of dryings are 0.5～2 hour then, make product.

8, method according to claim 7 is characterized in that each section of twin-screw granulating extruder temperature is followed successively by: 120～130 ℃ in a district, 130～140 ℃ in two districts, 140～150 ℃ in three districts; Head temperature is 150～160 ℃.